My nurse told me boy and she was right. It was from the heart rate. His journal heart rate is around 140-145. Girls supposedly are faster. Nothing is 100% until you see boy parts or girl parts but it's a little more scientific.
According to the myth you are having a girl.
But get a test to be sure because those stories don't work all the time
U can find out through a blood test as early as 10 weeks.